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Debt - Short-Term Debt (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Short-Term Debt |  |
Credit facilities | $ 1,024.8 | $ 933.4
Short-term debt | 152.7 | 61.1
Credit facility maturing in October 2027 | Principal Life Insurance Company |  |
Short-Term Debt |  |
Credit facilities | $ 800.0 | $ 800.0
Unsecured lines of credit |  |
Short-Term Debt |  |
Weighted-average interest rates on short-term borrowings (as a percent) | 7.60% | 15.60%
Unsecured lines of credit | Principal Compania de Seguros de Vida Chile S.A. |  |
Short-Term Debt |  |
Credit facilities | $ 77.0 | $ 97.3
Short-term debt | 31.1 | 58.4
Unsecured lines of credit | Principal International de Chile S.A. |  |
Short-Term Debt |  |
Credit facilities | 21.8 | 33.6
Short-term debt | 2.6 | 0.2
Secured subscription facility |  |
Short-Term Debt |  |
Credit facilities | $ 150.0 |
Weighted-average interest rates on short-term borrowings (as a percent) | 6.84% |
Secured subscription facility | Principal Credit Real Estate Income Trust |  |
Short-Term Debt |  |
Credit facilities | $ 126.0 |
Short-term debt | $ 119.0 |
Commercial paper |  |
Short-Term Debt |  |
Support provided by back-stop facility for commercial paper program (as a percent) | 100.00% |
Back-stop facility outstanding balances | $ 0.0 | 0.0
Uncollateralized debt | Other short-term borrowings |  |
Short-Term Debt |  |
Credit facilities |  | 2.5
Short-term debt |  | $ 2.5

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